if (logger.isDebugEnabled()) {
                logger.debug("container was destroyed.");
            }
            return;
        } catch (final Exception e) {
            if (!ComponentUtil.available()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("container was destroyed.");
                }
                return;
            }

public class EmptyGenerator extends BaseThumbnailGenerator {

    @Override
    public boolean generate(final String thumbnailId, final File outputFile) {
        return false;
    }

    @Override
    public void destroy() {
        // nothing
    }

            final List<String> list = entry.getValue();
            paramMap.put(entry.getKey(), list.toArray(new String[list.size()]));
        }
        return paramMap;
    }

    @Override
    public void destroy() {
        // nothing
    }

    }

    private static void destroyContainer() {
        TimeoutManager.getInstance().stop();
        synchronized (SingletonLaContainerFactory.class) {
            SingletonLaContainerFactory.destroy();
        }
    }

    private static int process(final Options options) {
        final DynamicProperties systemProperties = ComponentUtil.getSystemProperties();

            TimeoutManager.getInstance().stop();
            if (logger.isDebugEnabled()) {
                logger.debug("Destroying LaContainer...");
            }
            SingletonLaContainerFactory.destroy();
            logger.info("Destroyed LaContainer.");
        }
    }

    private static int process(final Options options) {
        final Crawler crawler = ComponentUtil.getComponent(Crawler.class);

    @Override
    public void rollback() {
        for (final MultipartFormFile formFile : elementsFile.values()) {
            formFile.destroy();
        }
    }

    // ===================================================================================
    //                                                                            Add Text

        }
        if (ComponentUtil.hasIngestFactory()) {
            ingestFactory = ComponentUtil.getIngestFactory();
        }
    }

    @PreDestroy
    public void destroy() {
        if (!finishCrawling) {
            if (logger.isInfoEnabled()) {
                logger.info("Stopping all crawler.");
            }
            forceStop();
        }
    }

    @PreDestroy
    public void destroy() {
        generating = false;
        thumbnailQueueThread.interrupt();
        try {
            thumbnailQueueThread.join(10000);
        } catch (final InterruptedException e) {
            logger.warn("Thumbnail thread is timeouted.", e);
        }
        generatorList.forEach(g -> {
            try {
                g.destroy();
            } catch (final Exception e) {

    }

    private static void destroyContainer() {
        TimeoutManager.getInstance().stop();
        synchronized (SingletonLaContainerFactory.class) {
            SingletonLaContainerFactory.destroy();
        }
    }

    private static int process(final Options options) {
        final DynamicProperties systemProperties = ComponentUtil.getSystemProperties();

        crawlerStatsHelper.begin(key);
        crawlerStatsHelper.record(key, "aaa");
        logger.info(localLogMsg.get());
        assertNull(localLogMsg.get());

        crawlerStatsHelper.destroy();
        logger.info(localLogMsg.get());
        String[] values = localLogMsg.get().split("\t");
        assertEquals(3, values.length);
        assertEquals("url:test", values[0]);